I owned a cassette tape of this orchestra performing Shostakovich back in the day. I remember the tuba being very prominent. While chatting with Harvey Phillips about players in these non-city named orchestras, I asked him who the tuba player was and he said it was him! Now, I know he was on that particular recording, but can't say definitively that he is the tuba player on your recording, but I wouldn't be surprised. Do you know the dates of the recording? Might be another former student of Mr. Phillips on here that would know for sure.